About Crowns
A crown (sometimes called a cap) is an artificial cover that is placed on an individual tooth (somewhat like a thimble over your finger) to restore a decayed or damaged tooth to its normal shape and size. This procedure is often necessary when there is no longer sufficient tooth structure left to place a filling. It is also useful for protecting teeth that are cracked or broken. A crown can also be used to change the shape of a tooth, to correct a bite or cosmetic problem, or to replace existing broken or poor-fitting crowns.
About Bridges
Sometimes called a fixed partial denture, a bridge replaces missing teeth with artificial teeth, looks great, and literally bridges the gap where one or more teeth may have been. Bridges are a fixed restoration that cannot be removed, unlike a partial denture. The restoration can be made from gold alloys, porcelain or a combination of these materials and is attached to surrounding teeth for support.